Measurement is a scientific process that is used to compare the measurement of an object or phenomenon with another that has the same physical magnitude.
3 Types Of Measurement:
That is, the types of measurement allow us to calculate the number of times a pattern is contained in a specific magnitude.
In this way the pattern works to obtain the unit of measurement to be used. This measure must be unalterable, universal (that can be used anywhere in the world) and easy to reproduce.
However, it is worth mentioning that sometimes measurements may be inaccurate due to the instruments used, which may present flaws in the measurement process.
1. Direct measurement
It is the one obtained directly from the instrument that is used in the measurement process and that has the ability to compare the variable to be measured with a specific standard.
For example, some instruments that perform a direct measurement can be:
- The ammeter, to measure the amperage of an electrical circuit;
- The caliper, to measure the length of an object,
- The stroboscope, to measure the frequency of vibration and rotation of an object.
2. Indirect measurement
Indirect measurement is one that is obtained from the calculation of the set of data collected from one or more different physical magnitudes, which were previously calculated through direct measurement. Therefore, indirect measurement is not obtained through a particular instrument.
Some examples of indirect measurement would be the following:
- Speed of an object: time and distance measurements are used for its calculation.
- Value of a resistance: direct measurement instruments are used, such as the ammeter (which measures current), and the voltmeter (which measures voltage), and the necessary data are obtained to calculate the value of a resistance by applying the Ohm law.
3. Reproducible measurement
A reproducible measurement is one that can be repeated and reviewed several times by different researchers and always obtain the same result. In this type of measurements, it is important that non-destructive tests be carried out. For example, when measuring the length of a large object several times, such as a bed, desk, etc.
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